beatmania IIDX 26 Rootage (AC)

There's a chance the leaked songs are for a new event and not ARC SCORE.

This is true. Next Tales 2 Oath is expected in the game at some point, it was confirmed last month to be coming to Rootage but no time frame of unlocking it was released. The other 2 could be for separate other events you're right, but judging by some things, it strongly points to Arc Score for me, but we will see.

EDIT: BemaniLeaks is gone. Either got copyright claimed by Konami or got yelled at for posting unlocks before they're out.

So far HARD BRAIN, Lift Us High and 深愛のリグレット are my favorites from the first floor. Zendegi Dance is really cool and fun, Nice to see Garuda cross over, and Next tales is a nice theme song for Ring, kinda wish I could have been at that event. Overall this is a really strong start and I can't wait for the rest!